Aussie "bear" (5)
I believe the answer is:
koala
'aussie bear' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for koala that I've seen before include "Australian creature" , "Australian marsupial which lives on eucalyptus leaves" , "Aussie tree-climber" , "Aussie 'bear'" , "Eater of eucalyptus" .)